Low nox staged fuel injection burner for creating plug flow

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EP 1 916 477 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	08.07.2009 Bulletin 2009/28

(43)	Date of publication A2:
	30.04.2008 Bulletin 2008/18

(21)	Application number: 07118635.7

(22)	Date of filing: 17.10.2007

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International Patent Classification (IPC):

F23D 14/22^(2006.01)
F23D 14/48^(2006.01)

F23D 14/58^(2006.01)
F23D 23/00^(2006.01)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
	Designated Extension States:
	AL BA HR MK RS

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Priority:

24.10.2006 US 585473

(71)	Applicant: Air Products and Chemicals, Inc.
	Allentown, PA 18195-1501 (US)

(72)	Inventors:
	Li, Xianming Jimmy Orefield, PA 18069 (US) Joshi, Mahendra Ladharam Katy, TX 77450 (US) SLAVEJKOV, Aleksandar Georgi Allentown, PA 18104 (US)

(74)	Representative: Schwabe - Sandmair - Marx
	Patentanwälte Stuntzstrasse 16 81677 München 81677 München (DE)

(54)	Low nox staged fuel injection burner for creating plug flow

(57) A burner for producing a plug-like flow and low NOx emissions. The burner has a central air jet and plural staged fuel jets surrounding the central jet. The ratio of the sum of the momentums of vector components of the staged jets along respective axes parallel to the central longitudinal axis of the central jet to the momentum of the central jet along that axis is within the range of 0.5 to 1.5 and most preferably 0.8.

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